Improvement in force and lift pumps



F. MILLER.

FORCE AND LIFT PUMP.

Patented May 9,187.6.

N. FUER-S, PHOTO-LITMOGRAFHER. WSHXNGTDN. D. C.

' provision is made to preserve the-relative po- UNITEE STATES PATENTOFFICE.

FRANKLIN MILLER, 0E PITTs'RURe, PENNSYLVANIA.

IMPROVEMENT IN FORCE AND' LIFT PUMPS.

Specitication forming part of Letters Patent No. 177,143, dated May 9,1876 application filed March 7, 187e.

To all whom it may concern:

Be it known that I, FRANKLIN MILLER, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement in Force and Lift Pumps; and I do hereby declare thefollow-- ing to be a full, clear, and exact description thereof,reference being had to the accompanying drawing, forming a part of thisspecilication, and which is a vertical section cfa pump embodying myinvention.

lVIy invention relates to the construction of force and lift pumps,wherein the dischargepipe, orl a fixed cylinder having suitable valves,telescopes with an outer valve-cylinder, and consists in making theinner diameter ofthe outer or telescoping cylinder to exceed that of thetixedcylinder to such an eX- tent as will permit the interposit-ion of ailexible packing, which obviates the friction incident to thetelescoping oi' close cylinders, thus increasing' the capacity andreducing the power requisite to operatethe pump 5 and also in combiningwith the fixed and movable cylinders a series of guii'les, forpreserving the concentricity ofthe cylinders without contact thereof.

I will now proceed to describe my invention, so that others skilled inthe art to which it appertains may apply the saine.

In the drawing, A indicates a xed airchamber, which may be of anyapproved form 5 and a, the discharge-pipe, extending down nearly to thebottom of the air-chamber, and constituting the dip-pipe common to suchdevices. b is an annular shoulder or.l ring formed on or secured to thelower end of airchamber A, and B is a threaded ring, carrying theair-chamber valve a. G is a washer, oi' leather or other flexiblesuitable material, which is clamped between the shoulder b and ring B,when the ring is screwed on theend ot' the air-chamber, said washerserving to pack the telescopic cylinder D. p

- D is a cylinder, open atone end and closed at the opposite end, butprovided with a valve, d, which opens inward. Said cylinder slides uponor-telescopes with the air-chamber A, and is provided with guides d',which pass' through eyes c on the air-chamber A; or like sition of thecylinder D.

E is a yoke fastened to the cylinder D, as i means of which it issuspended, in such-a v manner as to entirely submerge the cylinder D,though the devices will operate when D is only partially submerged.

rIhe operation of these devices is as follows: On the descent ofcylinder D the valve d in the bottom thereof opens and the liquidenters, instantly lling the cylinder, the weight and momentum of thecylinder aiding the operation. Upon the reverse movement of the cylinderthe valve d closes, and the'telescoping of the cylinders lifts theair-chamber valve, and forces the contents of cylinder D into thedischarge-pipe or air-chamber. Upon'the descent of cylinder D the uppervalve is shut by the weight or" the liquid column above it, the lowercylinder fills, as bel'ore, and the several operations are repeated asoften as the cylinder Dis reciprocated. y

Whenever desired the air-chamber may be omitted, when, of course, thecylinder D will telescope with the lower part of the dischargepipe, anda suitable valve will be required to take the place of the valve shownin the lower end of air-chamber A.

As the washer C moves loosely in the cylininder D it will offer noresistance to the descent oi' the cylinder, but will be distended byliquid during the ascent otthe cylinder, and form an eii'ectual packing.

Having thus described my invention, what I claim, and desire to secureby Letters Patent,`is

l. The combination of the discharge-pipe or xed cylinder, the movablevalve-cylinder, substantially as described, and the interposed flexiblepacking C, secured to the xed cylinder or discharge-pipe, for thepurpose specified.

2. The combination of the discharge-pipe or Aiizied cylinder, having theinterposed packing',

the movable valve-cylinder, and the guides, substantially as andfor thepurpose specified. In testimony whereof I, the said FRANKLIN MILLER,have hereunto set my hand.

' FRANKLIN MILLER. Witnesses:

F. W. RITTER, Jr., JAMES I. KAY,

